code: def test_deserialization(self):
      serialized_feature_columns = feature.serialize_feature_columns(
          self._feature_columns
      )
      restored_feature_columns = feature.deserialize_feature_columns(
          serialized_feature_columns,
          custom_objects=self._custom_objects,
      )
      self.assertEqual(
          restored_feature_columns["utility"].get_config(),
          self._feature_columns["utility"].get_config(),
      )
      self.assertEqual(
          restored_feature_columns["unigrams"].get_config(),
          self._feature_columns["unigrams"].get_config(),
      )
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import six
  import tensorflow.compat.v2
  from tensorflow_ranking.python.keras import feature
label_desc: Use image node_id 2 for calling the FeatureColumnSerializationTest obj's underlying member method code with example usage: obj.test_deserialization() without return types